A 95.1% Efficiency Hybrid Hysteretic Reconfigurable 3-Level Buck Converter With Improved Load Transient Response

Analytical Benchmarking of Direct Hybrid Switched-Capacitor DC-DC Converters

“…While the comparison framework formalizes various design aspects, it's essential to acknowledge that practical converter designs require consideration of additional factors. These factors encompass a broad range of elements, including but not limited to, the voltage conversion ratio (VCR) range, startup procedures, gate driving techniques [80], level shifting methodologies, capacitor charge balancing strategies [33], [50], [51], feedback control mechanisms [47], [63], PCB routing, methods for inductor current balancing [58], specifications of input capacitors [64], [81], and considerations for electromagnetic interference (EMI) [29]. Although the losses associated with drain and source capacitances are not explicitly addressed in the paper, they can be factored into the overall switching losses.…”

“…Practical converter designs involve several considerations beyond just sizing of power transistors and passive components. These include factors such as VCR (DC gain) range, number of switches, gate driving, level shifters, capacitor charge balancing [33], [50], [62], voltage stress during the starting phase [52], feedback control [47], [48], [63], PCB routing, input capacitor [64] and EMI. While these considerations may make the low N topology an appealing choice, a final decision must take into account all relevant factors with appropriate weighting depending on the application.…”

“…As we investigate the HSCC for achieving a targeted voltage ratio M that differs from the natural N :1 given by the flying capacitors network, we introduce the ground state NML N:1 Flying-Capacitor Multi-Level [24], [47], [49], [51] NSP N:1 Series-Parallel [13], [25], [65] NFB N:1 Fibonacci Hybrid Converters [22], [65] NDS N:1 Hybrid Dickson Switched-Cap.…”

“…Choosing the right HSCC topology for a given application is crucial, as the topological choice distributes the constraints over the three main converter components (switches, capacitors, and inductors). Table 1 provides experimental data obtained by different research groups who have exper-imented with non-resonant HSCC using integrated Silicon power stages and inductors at the output with full softcharging operations [23], [47]- [54]. The data suggests that for most cases with MHz switching frequency, the inductor and flying capacitor are in the 100s of nH and µF range, respectively.…”

A 24 V to 1 V integrated dual-charging path dual-inductor hybrid converter for improved step-up load transient response

“…Approaches to improving step-up load transient response speed include adaptive On-time (AOT) and adaptive On/Offtime (AOOT) control 18,19) which optimize pulse width, and hysteresis control [20][21][22][23] which enables quick response. However, adopting these methods to DIH converters is still not enough to improve step-up load transient response as the duty cycle of DIH converters cannot exceed 50%.…”